Fast vs Body Rhythm
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Fast
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Feel Better. Stay on Track. Your Fasting Journey, Made Simple. Build healthy habits and stay in tune with your body—without the clutter or complexity. This beautifully simple app helps you track intermittent fasting in a calm, intuitive way that fits effortlessly into your daily routine. Why You’ll Love It: • No accounts, no login, no tracking. Your data, your device. • Gentle, Simple Tracking: Start and stop fasts with just a tap. No distractions, just a clear view of your progress. • Apple Watch Ready: Track your fasts directly from your wrist—even without your phone nearby. • At-a-Glance Insights: Stay mindful of your fasts with elegant widgets on your iPhone and Apple Watch. • Private by Design: Your data is stored securely in your personal iCloud account. Nothing ever leaves your devices. Whether you’re fasting for wellness, focus, or energy, this app is your quiet companion on the journey.
Body Rhythm
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Your workout, your rhythm. Rhythm is the ultimate interval timer designed for your Apple Watch and iPhone. Whether you're pushing through a grueling HIIT session, practicing mindfulness, or staying on top of your daily pelvic floor exercises, Rhythm adapts to your lifestyle. Key Features: Fully Customizable Intervals: Set active and rest times that match your goals. Versatile Activity Support: Perfect for HIIT, Tabata, Boxing, Yoga, and specialized routines like Kegel exercises and Meditation. Smart Scheduling: Organize your day with recurring routines and activities. Seamless Apple Watch Integration: Start and control your sessions right from your wrist. Elegant & Focused UI: A premium, distraction-free design with Light and Dark mode support. Progress Tracking: Stay motivated by viewing your activity history at a glance. Take control of your routines and find your rhythm today. Rhythm Pro: A one-time in-app purchase unlocks the creation of new schedules and removes ads. Activities, timers, history, widgets, Apple Watch, and existing schedules remain available without Pro.
Screenshots
Verdict
The clearest difference is in-app purchases: Fast at none against Body Rhythm's 1. Fast also leads on ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Body Rhythm sells 1 one-off in-app purchase. Fast asks for nothing beyond the download.
Fast ships an update every 2 weeks, Body Rhythm every 9 days. The most recent releases landed on October 30, 2026 and November 9, 2026 respectively.
| Parameter | Fast | Body Rhythm |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 weeks | Every 9 days — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, Apple Watch |
| Requires iOS | 26.0 — better | 26.2 |
| Further details — not scored | ||
| Size | 35 MB | 15 MB |
| Age rating | 4+ | 4+ |
| Developer | CodeHive | 阳 张 |
In-app purchases
Fast
No in-app purchases
Body Rhythm
- Rhythm Pro$2.99







